— m. 
PHILOSOPHICAL 
t 
TRANSACTIONS. 
-1 -J.J .J ' . " ; .. 
I. An Account of the Sun’s Diflance from 
the Earthy deduced from Mr . Short’s Ob- 
fervatiom relating to the horizontal Paral- 
lax of the Sun : In a Letter from Peter 
Daval, Efq\ V \ P. of R . S . to James Bar- 
row, Efq\ V \ P . of R . S. 
Read Jan. 13, A CCORDING to Mr Short, 
17 3 j \ the mean horizontal parallax of 
the Sun is 8", 65. 
Now this parallax is the angle, which the femidia- 
meter of the earth fubtends, being feen from the 
Sun. 
Therefore as 8", 65, is to 360° (the whole peri- 
phery of a circle) jfo is the femidiameter of the earth 
to the periphery of the orbit of the earth round the 
Vol. LIII. B Sun. 
